All but one module has been prototyped, checked, and can be pronounced working!!!!!!

The one hold up is the Ring Modulator. It's a straight forward design built around an MC1495 multiplier. The chip is out of production, but I thought I had found a good source for the Motorola chips. Unfortunately, all the chips I bought seem to be bad, not forgeries, just bad...

I found another source who bought a TON (like 30,000) of the On Semiconductor version. I'm reasonably confident these ones will work. Then one last small production order for the last three PCBs, then FINI. I can then finally finish building the modular I started in 1975.

With the "modules" for the Synthasystem done, I can turn to the keyboards. I'll do the DuoPhonic keyboard, then likely the MultiPhonic keyboard.

After that, there is always the Microcon which I can do, and one other sequencer I think I would like to try. We'll see.

Let me know if anyone is interested in any of the modules and we can work out somehow to get you a PCB:

18 different modules to choose from, not quite Doepfer, but a lot more fun and strictly VINTAGE!:

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